Singlespeed & Fixed Gear"I still feel that variable gears are only for people over forty-five.
Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

I finally got fed up with my crap-ass Park HCW-14 and bought a Park SR-2 chainwhip to replace it. This comes with 3/32" chain on it, and I needed 1/8" so I replaced the chain. If you just take the bolts out and swap the chain for an 1/8" piece, it will work, but you will narrow the one end of the end link(s) and as such put some weird forces on the opposite ends of the link, which in the long run I figure could cause at least one of the plates to pop off the link pin when you're pulling hard on a cog. I went to the hardware store and found some 3mm washers and some metric cap screws of the same thread and maybe 2mm longer than the stock bolts. I used the washers and longer bolts to make up for the difference in link width between the 3/32" and 1/8" chain. It only cost me about another buck for the small parts, but I now feel better about the chain durability on this thing now that the ends of the end links aren't crimped down. Yeah, it's only 1/32" difference but it would have bothered me if I didn't make up for it.

The thing with the SR-1 is that (as far as I can tell), the chain is riveted/pinned on. On the SR-2 it actually has small nuts/bolts holding the pieces of chain to the tool. If you could get the pins out of the SR-1 I'm sure you could replace them with the sorts of little bolts found on the SR-2. So....sort of.